Method of making bag frame locks



y 13, 1931 c. w. HARDY 2 087,203

v METHOD OF MAKING BAG FRAME LOCKS Filed March 1a, 1956 [av e 27/530 7*.- C'jzdl'les M Hardy Z19 vffi a any.

Patented July 13, 1937 METHOD OF MAKING BAG FRAME LQOKS Charles W. Hardy, Fcrest Hills West, N. Y., as-

signor to United-Carr Fastener. Corporation, Cambridge, Mass, a corporation of Massachusetts Application March 18, 1936, Serial No. 69,507

2 Claims.

My invention relates to an improved method of making knob-locks for attachment to the frames of hand bags and the like containers.

Referring to the drawing, which illustrates a preferred form of my invention:-

Fig. 1 is a fragmentary plan View of a strip of scrap sheet metal material showing the manner in which the knob-lock blanks are cut therefrom;

Fig. 2 is a section taken on the line 22 of Fig. 1;

Fig. 3 is a top view of the blank member from which my improved knob-lock is constructed;

Fig. 4 is a side View of the blank member shown in Fig. 3; i

Fig. 5 is a bottom view of the blank member shown in Fig. 3;

Fig. 6 is a top view of the finished knob-lock as produced from the blank member shown in Figs. 3-5;

Fig. 7 is a side view of the knob-lock shown in Fig. 6;

Fig. 8 is a bottom view of the knoblock shown in Fig. 6; and

Fig. 9 is a side view of a pair of my improved knob-locks in finished form and assembled with a hand bag frame.

The object of my invention is to provide a simple and inexpensive method for forming satisfactorily working knob-locks of attractive appearance adapted to be assembled with the frame members of a hand bag for the purpose of closing the same.

Referring to the drawing, I have shown in Fig. 1 a fragmentary strip of scrap sheet metal i from which I have cut similarly shaped blank members, such as shown in Figs. 3-5. The material of one face 2 of the strip has been preferably rolled before the strip is subjected to the blanking operation so as to leave a margin of thicker material 3 running along one longitudinal edge of the side 2, as most clearly shown in Fig. 2. The other side 4 of the strip is relatively fiat in form. A series of similarly shaped apertures 5 (Fig. l) is left in the strip after the material has been taken to form the blank members.

The blank member, as shown in Figs. 3-5, comprises an arm portion 6 having a pair of lugs l integral therewith and adapted to be inserted through suitable apertures (not shown) in a hand bag frame 8 (Fig. 9) and upset in any satisfactory manner for securing the knob-lock to the frame. A knob 9 is formed integral with an upwardly disposed free end of the arm 6. In cutting out the blank members the strip 1 is disposed between a suitable punch and die tool means, which has not been shown in the drawing, so that the punch comes down upon the margin side 2 of the strip and as the punch cuts the blanks from the strip, a curved or rounded form is given to a side ll! of the blank member (Figs. 3 and 5) due to the fact that the member is unsupported on that side of the strip resting upon the die means. The knob 9 of the blank is preferably cut from the thickened margin material 3 while the arm 6 is cut from the thinner material of the strip l with the result that the fiat side of the knob 9 projects laterally beyond the arm 6, as most clearly shown in Figs. 3 and 5.

After the blank member has been formed, as described, it is subjected to a final swaging operation or operations, as required, with the result that portions of the side it of the member are rounded to an even greater degree toward the longitudinal center line of the top and bottom surfaces of the member and, at the same time, the fiat side of the blank is correspondingly curved or rounded so that the finished knob-lock presents opposed sides of substantially symmetrical shape, as most clearly shown in Figs. 6 and 8. Also, opposed sides of the lugs i may be squeezed toward each other during the final swaging operation so that they project from the arm 6 at a point spaced from the opposed side walls thereof to form shoulders so that the arm 6 will conceal the apertures in a frame through which the lugs extend.

It will thus be seen that I have provided a knob-lock which is made in a solid form of a one-piece blank, by a method enabling the members to be manufactured inexpensively in large quantities. Furthermore, the rounded formation of the knobs 9, effected by swaging, as described above, enables theknobs to be easily snapped by each other into fastening engagement (Fig. 9) by pressure upon the bag frames, and a customary relative movement of the knobs in regard to each other brings about easy disengagement of the locking members.

Although I have illustrated and described a preferred method of carrying out the objects to which this present invention is directed, I do not wish to be limited thereby, because the scope of my invention is best set forth in the following claims.

I claim:

1. A method of making knob-locks for hand bags and the like, each knob-lock having an arm portion, attaching means integral therewith, and

a knob of greater thickness than said arm portion which comprises first cutting a blank having said portions from a sheet metal strip having a preformed thickened portion adjacent to one edge,

said blank being cut from said strip in such a way that the knob portion of said blank is taken from the thickened portion of said strip, and then swaging said blank to provide. rounded edges on s at least some of the edges of said blank and to reduce the thickness of the attaching means.

2. A vmethod of making knob-1ocks for hand bags and the like, each knob having an arm portion, attaching lugs integral therewith, and a knob integral with one end of said arm and of greater thickness than the same which comprises first cut ting a blank having such :portions from a sheet said arm portion at a point spaced from opposed 10 edges of said arm portion to leave shoulders.

CHARLES W. HARDY. 

